Use-after-free in Foxit PDF Reader for Windows and Foxit PDF Editor (formerly Foxit PhantomPDF) - CVE-2021-21831
Published: July 27, 2021 / Updated: August 30, 2021
Vulnerability identifier: #VU55325
CSH Severity: High
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-21831
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error when handling certain Javascripts or annotation objects in PDF files. A remote attacker can trick the victim to open a specially crafted PDF file and execute arbitrary code on the target system.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
Affected software
Foxit PDF Reader for Windows
Foxit PDF Editor (formerly Foxit PhantomPDF)
Foxit PDF Editor (formerly Foxit PhantomPDF)
How to mitigate CVE-2021-21831
Install updates from vendor's website.
Foxit PDF Reader for Windows - update to 11.0.1.49938
Foxit PDF Editor (formerly Foxit PhantomPDF) - addressed in versions 10.1.5.37672, 11.0.1.49938
Foxit PDF Editor (formerly Foxit PhantomPDF) - addressed in versions 10.1.5.37672, 11.0.1.49938